617 trucks were lost this turn during unit movement 5352 trucks have been lost during the campaign due to unit movement 340 trucks were lost performing unit resupply operations 1357 trucks were damaged performing unit resupply operations 4528 supply trucks have been lost during the campaign 4603 trucks were repaired and returned to the logistics pool O.K.H. is isolated

I ran a turn of that scenario using the latest version and did not get the OKH message. Using the latest version I'm surprised that you'd get that message since the change should keep the off map rail hexes in play for the off map units. Please post a save just before this happens (attach here or email to 2by3@2by3games.com).